SiTrackerMultiRecHitUpdator.h

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#ifndef SiTrackerMultiRecHitUpdator_h
#define SiTrackerMultiRecHitUpdator_h

#include "DataFormats/GeometryVector/interface/LocalPoint.h"
#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHit.h"
#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHitBuilder.h"


#include <vector>

class SiTrackerMultiRecHit;
class TrajectoryStateOnSurface;
class TrackingRecHit;   
class TransientTrackingRecHitBuilder;
class LocalError;
class TrackingRecHitPropagator;
/*
builds a TSiTrackerMultiRecHitout of a vector of TrackingRecHit ans a tsos
or updates an existing TSiTrackerMultiRecHitout given a tsos.
*/

class SiTrackerMultiRecHitUpdator{
 public:
  typedef std::pair<LocalPoint,LocalError>  LocalParameters;
  
  SiTrackerMultiRecHitUpdator(const TransientTrackingRecHitBuilder* builder,
                  const TrackingRecHitPropagator* hitpropagator,
                  const float Chi2Cut,
                  const std::vector<double>& anAnnealingProgram);
  virtual ~SiTrackerMultiRecHitUpdator(){};
  
  const std::vector<double>&  annealingProgram() const {return theAnnealingProgram;}
  
  //builds a TSiTrackerMultiRecHit 
  virtual TransientTrackingRecHit::RecHitPointer  buildMultiRecHit(const std::vector<const TrackingRecHit*>& rhv, 
                                   TrajectoryStateOnSurface tsos,
                                   float annealing=1.) const;
  
  //updates an existing TSiTrackerMultiRecHit
  //in case a diffrenet king of rechit is passed it returns  clone(tsos)
  virtual TransientTrackingRecHit::RecHitPointer  update( TransientTrackingRecHit::ConstRecHitPointer original,  
                              TrajectoryStateOnSurface tsos,
                              double annealing=1.) const;
  
  //returns a TSiTrackerMultiRecHit out of the transient components 
  virtual TransientTrackingRecHit::RecHitPointer  update( TransientTrackingRecHit::ConstRecHitContainer& tcomponents,          
                              TrajectoryStateOnSurface tsos,
                              double annealing=1.) const;
  
  const std::vector<double>& getAnnealingProgram() const {return theAnnealingProgram;}
  
 private:
  LocalError calcParametersError(TransientTrackingRecHit::ConstRecHitContainer& map) const;
  LocalPoint calcParameters(TransientTrackingRecHit::ConstRecHitContainer& map, const LocalError& er) const;
  LocalParameters calcParameters(TransientTrackingRecHit::ConstRecHitContainer& map) const;
  
  const TransientTrackingRecHitBuilder* theBuilder;
  const TrackingRecHitPropagator* theHitPropagator;
  double theChi2Cut;
  const std::vector<double> theAnnealingProgram;

};
#endif